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<h1 class="topictitle1">Viewing the ESN of a Device</h1>
<div><p id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_a536d505159d14653bf4ad0b5627ae30e">An equipment serial number (ESN) is a character string that uniquely identifies a device. An ESN is required when you apply for licenses, request device repair services, or configure eService.</p>
<div class="section" id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_s2555edec853e443bb5ac128104e2e2df"><h4 class="sectiontitle">Context</h4><ul id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_u6522035d1afd425f84f39abe81b9c814"><li id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_l66ba75fb308643d6b30f472e64cc6ab2">You can query the ESN of the <span id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_text168447971315">OceanProtect</span> via the controller enclosure information plate, <span id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_text12363155412409">OceanProtect</span> management page, or CLI.</li><li id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_en-us_topic_0153321585_li14975122111">For a multi-controller system with two or more controller enclosures, the ESN of the system is the ESN of controller enclosure 0. The ESN of the multi-controller storage system queried on the management interface or the CLI through the management network port of any controller enclosure is the ESN of controller enclosure 0. You are advised to use the <span id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_text380365612409">OceanProtect</span> management page or the CLI to query the device ESN. To check the ESN on the information plate, determine the position of controller enclosure 0 by referring to the system networking diagram used when additional controllers are added and then check the ESN on the information plate of controller enclosure 0.</li></ul>
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<div class="section" id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_s9f96c43f7110492788d0c18afc169845"><h4 class="sectiontitle">Querying the ESN on the Information Plate</h4><p id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_ac84053e6414d41ffb7913e645d65847d">The information plate is located on the right side of the front panel of a controller enclosure, as shown in <a href="#EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_ff302a5bcbba14b30a07136e9b91d5dba">Figure 1</a>. You can pull out the information plate from the controller enclosure to query device information.</p>
<div class="fignone" id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_ff302a5bcbba14b30a07136e9b91d5dba"><a name="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_ff302a5bcbba14b30a07136e9b91d5dba"></a><a name="en-us_topic_0000001792505326_en-us_topic_0223232571_ff302a5bcbba14b30a07136e9b91d5dba"></a><span class="figcap"><b>Figure 1 </b>Information plate position on a 2 U controller enclosure</span><br><span><img id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_image10699186153512" src="en-us_image_0000001792505654.png"></span></div>
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<div class="section" id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_section168091911318"><h4 class="sectiontitle">Querying the ESN on the Management Page</h4><ol id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_o623d109b5eee4c7da408bac80bf9520c"><li id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001607531760_en-us_topic_0000001311295305_en-us_topic_0000001149078659_li929117916361"><span>Choose <span class="uicontrol" id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0000001839223165_en-us_topic_0000001839143213_en-us_topic_0000001311295305_en-us_topic_0000001149078659_uicontrol1098185683619"><b><span id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0000001839223165_en-us_topic_0000001839143213_text157651936143415"><strong>System</strong></span> &gt; <span id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0000001839223165_en-us_topic_0000001839143213_text49601653123416"><strong>Infrastructure</strong></span> &gt; <span id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0000001839223165_en-us_topic_0000001839143213_text112401684352"><strong>Cluster Management</strong></span></b></span>.</span></li><li id="EN-US_TOPIC_0000001792504958__li19932939164117"><span>In the <span class="uicontrol" id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0000001839223165_en-us_topic_0000001839143213_uicontrol1050641575312"><b><span id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0000001839223165_en-us_topic_0000001839143213_text133861121163513"><strong>Local Cluster Nodes</strong></span></b></span> area of the <span class="uicontrol" id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0000001839223165_en-us_topic_0000001839143213_uicontrol13691645105219"><b><span id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0000001839223165_en-us_topic_0000001839143213_text1763193125313"><strong>Backup Cluster</strong></span></b></span> tab page, click the node name.</span></li><li id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_li1115217015589"><span>In the <span id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_text1760185102512"><strong>Basic Info</strong></span> area of the displayed <span class="uicontrol" id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0000001656571657_en-us_topic_0000001607531760_uicontrol1144724616332"><b><span id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0000001656571657_en-us_topic_0000001607531760_text51761646203516"><strong>Node detail</strong></span></b></span> dialog box, view the value of <span id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_text9492932173513"><strong>ESN</strong></span>, which is the current ESN of the system, as shown in <a href="#EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_fig25062781412">Figure 2</a>.</span><p><div class="fignone" id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_fig25062781412"><a name="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_fig25062781412"></a><a name="en-us_topic_0000001792505326_fig25062781412"></a><span class="figcap"><b>Figure 2 </b>Basic system information</span><br><span><img id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0000001792505494_image9336161282517" src="en-us_image_0000001955526849.png"></span></div>
</p></li></ol>
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<div class="section" id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_section1980119121319"><h4 class="sectiontitle">Viewing the ESN on the CLI</h4><ol id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_en-us_topic_0153321585_ol649308255"><li id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_en-us_topic_0153321585_li748308251"><span>Use PuTTY to log in to the CLI as user <strong id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_b14761121614433">admin</strong>.</span></li><li id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_l3aebbc9bd89d4fb5900a9eae024d489e"><span>Run the <strong id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_a1e99e1a76d1b43b28ad7b2d3bf858fe2"><b><span class="cmdname" id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_c8c09cfe7f27b4a21bf61af3886664f9b">show system general</span></b></strong> command. In the output, <span class="parmname" id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232571_p1927f01da090465ca5014baca1ed78d6"><b>SN</b></span> indicates the ESN.</span><p><pre class="screen" id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_en-us_topic_0223232608_screen61973473">admin:/&gt;show system general

  System Name         : Huawei.Storage               
  Health Status       : Normal                       
  Running Status      : Normal                       
  Total Capacity      : 996.471TB                    
  SN                  : 2102354PBA13D9988001         
  Location            :                              
  Product Model       : OceanProtect X8000           
  Product Version     : <em id="EN-US_TOPIC_0000001792504958__en-us_topic_0000001792505326_i1020211102384">XXXX</em>                     
  High Water Level(%) : 80                           
  Low Water Level(%)  : 20                           
  WWN                 : 210030fbb8c80ded             
  Time                : 2022-06-17/10:06:16 UTC+08:00 
  Patch Version       :                              
  Description         :</pre>
</p></li></ol>
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